A Lake Villa man is accused of sexually assaulting two females over the course of 20 years, authorities said.

Billy W. Moore, 48, of Lake Villa, was charged Monday with 20 counts of criminal sexual assault and two counts of aggravated criminal sexual assault, the Lake County Sheriff’s office said Thursday in a news release.

Police said two females reported the alleged sex assaults, which police said started when the alleged victims were younger than 13.